151Eu Mössbauer spectroscopic and XRD study on some fluorite-type solid solution systems, EuyM1−yO2−y/2 (M=Zr, Hf, Ce)
151Eu Mössbauer spectroscopy and powder x-ray diffractometry (XRD) have been applied to elucidate the local structure around the trivalent europium (Eu3+) in the titled three defect-fluorite systems. From this study, it has been clarified that in contrast to Eu-Ce system the stabilized cubic-fluorite phase in Eu-Zr and Eu-Hf systems has most likely a pyrochlore-type local structure (microdomain structure).
KeywordsIsomer Shift Pyrochlore Phase Mossbauer Spectrum Japan Atomic Energy Research Institute Microdomain Structure
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